1) which product is negative? a) −7⋅(−3)⋅(−9)⋅0 b) −3⋅4⋅(−2)⋅(−7) c) −4⋅(−6)⋅(−3)⋅(−5) d) −3⋅5⋅(−6)⋅4 2) multiply. −7⋅8 a) −56 b) −1 c) 1 d) 56 3) multiply. (21)⋅(−7) a) −147 b) −14 c) 14 d) 147 4) what is the product? −4⋅2⋅(−9) a) −72 b) −11 c) 72 d) 144 5) what is the product? 7⋅(−5)⋅(−3)⋅(−8) a) −840 b) −105 c) 105 d) 840

Oliver had $50 on the day before his birthday. after he recived some money for his birthday , he had $75. write and solve eqaution to find how much money oliver received for his birthday. x+50=75

How many doughnuts are equal to 20 cookies.? 3 apples = 5 bananas6 cookies = 7 apples2 doughnuts = 1 banana

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect